There are generally two paths for dealing with someone in power when disagreements arise. One is to confront, and the other is to understand and influence. What is interesting is the most common path taken is the former while the most successful is the latter. I think the reason is that the former path is both the natural path for disagreement and the most visible. Confrontation is always more newsworthy than influence. When done right, exerting influence has the odd result of not conveying credit while actually making far more progress.